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+<refentry xmlns="http://docbook.org/ns/docbook"
+          xmlns:xlink="http://www.w3.org/1999/xlink"
+          xmlns:xi="http://www.w3.org/2001/XInclude"
+          xmlns:exsl="http://exslt.org/common"
+          xmlns:src="http://nwalsh.com/xmlns/litprog/fragment"
+          xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+          version="5.0" xml:id="exsl.node.set.available">
+<refmeta>
+<refentrytitle>exsl.node.set.available</refentrytitle>
+<refmiscinfo class="other" otherclass="datatype">boolean</refmiscinfo>
+</refmeta>
+<refnamediv>
+<refname>exsl.node.set.available</refname>
+<refpurpose>Is the test function-available('exsl:node-set') true?</refpurpose>
+</refnamediv>
+
+<refsynopsisdiv>
+<src:fragment xml:id="exsl.node.set.available.frag"><xsl:param name="exsl.node.set.available"> 
+  <xsl:choose>
+    <xsl:when exsl:foo="" xmlns:exsl="http://exslt.org/common"
+      test="function-available('exsl:node-set') or
+                       contains(system-property('xsl:vendor'),
+                         'Apache Software Foundation')">1</xsl:when>
+    <xsl:otherwise>0</xsl:otherwise>
+  </xsl:choose>
+</xsl:param>
+</src:fragment>
+</refsynopsisdiv>
+
+<refsection><info><title>Description</title></info>
+
+<para>If non-zero,
+then the exsl:node-set() function is available to be used in
+the stylesheet.
+If zero, then the function is not available.
+This param automatically detects the presence of
+the function and does not normally need to be set manually.</para>
+
+<para>This param was created to handle a long-standing
+bug in the Xalan processor that fails to detect the
+function even though it is available.</para>
+
+</refsection>
+</refentry>